Until it withdrew it, Microsoft allowed its COFFEE auditing tools to be shared, allowing whoever uses it to access Windows. It also provided it to law enforcement agencies.
According to comments, the tools are not very good and 'bad guys' use better tools. For the UK, that relates to section 3A of the revised CMA 1990.
Microsoft's COFEE Computer Forensic Tools Leaked (techDirt, 9 November 2009)